Hello,
I apologize for the issue you are facing with your Sitemap_Index.xml throwing a 404 error. Since you’ve already followed the steps mentioned in our blog, here are a few additional troubleshooting steps you can try:
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Flush Permalinks: Go to your WordPress admin area, navigate to Settings → Permalinks, and click the Save Changes button. This can often resolve 404 errors related to sitemaps.

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Check Sitemap Location: Ensure that your sitemap is located in the root folder of your WordPress installation. The URL should look like this: https://yourdomainname.com/sitemap_index.xml
.
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Check for Plugin Conflicts: Sometimes, other plugins can interfere with the sitemap functionality. You can use the Health Check plugin to identify any conflicts.
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Clear Cache: If you have caching enabled on your site, clear your cache to ensure that you are not viewing an outdated version of your sitemap.
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Check Server Configuration: If you’re using Apache or Nginx, ensure that your server is configured correctly to serve the sitemap files.
If these steps do not resolve the issue, please reply to this ticket with any error messages you are seeing or any additional details about your setup, and a human agent from the Rank Math Support team will assist you further. Thank you for your patience!
Sources:
Rank Math Sitemap Issues and Their Fixes » Rank Math
How to Configure Sitemaps in Rank Math – Best Settings and Tips
I have already done all these steps. still showing 404..
solved now.. there was no post in website
Hello,
Glad that everything has been sorted out.
Please feel free to reach out to us again in case you need any other assistance.
We are here to help.
Thank you.